Ok. So there's this fun little combo called Sprout Swarm/Intruder Alarm, and I personally think it's one of the only combos in Modern than can go toe-to-toe with Splinter Twin.
PROS:
-Saps have better interdeck interaction than Pestermite/Exarch tokens (Utopia Mycon makes them sac for mana, which is absolutely godlike)
-Because you have easy sac outlets, Fecundity lets you draw your entire deck at instant speed while you get infinite mana to deal with whatever they try to stop you with
-You're still in blue, so you get all the fun counterspells
-Backup Wincon is just token overrun starring Pallid Mycoderm and the Parallel Lives Gang, and honestly if you're about to combo for game and Sprout Swarm gets countered, you're probably halfway to this wincon anyway.
-Splinter Twin requires (at a minimum) a blue mana, a colorless mana, and two red. sPLANTer Twin only requires one green mana, one blue mana, one colorless mana, and three to five tokens, depending on how much land you have untapped when you want to go off (0 if 5 tokens/creatures, 1 if 4, 3 if 3)
-sPLANTer Twin is also instant speed. W/ Utopia Mycon out, you can win at the exact same time they do. In fact, with Blasting Station in hand or Fecundity on the field, you can win in response to them comboing for game.
-Instants are harder to counter than creatures. There's a lot less hate for them
CONS:
-You need tokens to win. This is why there's four anti-boardwipe spells in the sideboard. w/ Utopia Mycon out, you can always sac everything for mana in response to a boardwipe, but unless you have fecundity out things are not going to be happy fun time.
-Tokens don't have haste. I guess RUG sPLANTer would work if you really want haste, but if you're doing RUG you might as well just play TarmoTwin. Unless you're poor like me. Then don't.
-Because your tokens don't have haste, you need either
Vitaspore Thallid
(or Chord) or Blasting Station out or in hand, otherwise they have a turn to kill you if you go infinite during your own turn.
-Utopia Mycon dies to everything. 0/2 isn't fun in Modern. While it's not necessary to win, it takes the pennies off the train track, so to speak. Be prepared to see it take lightning bolts to the face a lot.
-Without a sac outlet, Saproling tokens are ass tier.
Seeing as I haven't fought anything real with this yet, I honestly have no idea if it'll work, which is why I'm taking suggestions. I've got faith in the core combo, so once the cards come in I'll be taking it to some events. Will post results when it happens.
Key Combos/interactions:
Intruder Alarm + Sprout Swarm
. The bread-and-butter of the deck. You don't need this to win, but it ends the game pretty quick. Add Blasting Station, Utopia Mycon, and Fecundity to taste. If you want to Johnny, adding Pallid Mycoderm makes infinite infinity/infinity tokens. Which are nice.
Serum Visions is, well, serum visions. Nothing needs to be said here.
Intruder Alarm makes all convoked cards free, if you can convoke them for their entire costs. That's a nice-side effect.
This deck is pretty high variance--it either explodes or it craps out and doesn't do much. I'm okay with that, but when you get a T4 goldfish win followed by a T12 it kinda sucks. On average, though, you'll see winning results on T5 or 6.
